stu_info = []
def print_menu():
    print('='*30)
    print('学生管理系统 V10.0')
    print('1.添加学生信息')
    print('2.删除学生信息')
    print('3.修改学生信息')
    print('4.查询学生信息')
    print('0.退出系统')
    print('='*30)

def add_stu_info():
    new_name = input('请输入新学生的姓名')
    new_sex = input('请输入新学生的性别(男/女)')
    # if new_sex != '男' | new_sex != '女':
    #     print('请输入正确的性别')
    #     new_sex = input('请输入新学生的性别(男/女)')

    new_phone = input('请输入新学生的手机号')
    new_info = dict()
    new_info['name'] = new_name
    new_info['sex'] = new_sex
    new_info['phone'] = new_phone
    stu_info.append(new_info)

def del_stu_info(student):
    del_num = int(input('请输入要删除的序号')) -1
    del student[del_num]
    print('删除成功')

def modify_stu_info():
    if len(stu_info) !=0 :
        stu_id = int(input('请输入要修改的学生的序号:'))
        new_name = input('请输入要修改学生的姓名:')
        new_sex = input('请输入要修改学生的性别:(男/女)')
        new_phone = input('请输入要修改学生的手机号码:')
        stu_info[stu_id -1]['name'] = new_name
        stu_info[stu_id - 1]['sex'] = new_sex
        stu_info[stu_id - 1]['phone'] = new_phone
    else:
        print('学生信息为空')

def show_stu_info():
    print('学生的信息如下:')
    print('='*30)
    print('序号   姓名   性别   手机号码')
    i = 1
    for tempInfo in stu_info:
        print("%d   %s   %s   %s" %(i,tempInfo['name'],
                                    tempInfo['sex'],tempInfo['phone'],))
        i+=1

def main():
    while True:
        print_menu()
        key = input('请输入功能对应的数字')
        if key == '1':
            add_stu_info()
        elif key =='2':
            del_stu_info()
        elif key =='3':
            modify_stu_info()
        elif key =='4':
            show_stu_info()
        elif key =='0':
            quit_confirm =input('亲，真的要退出么？ (Yes or No):').lower()
            if quit_confirm == 'yes':

                print('谢谢使用')
                break
            elif quit_confirm == 'no':
                continue
            else:
                print('输入有误')


if __name__ =='__main__':
    main()